<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>使用框架实例</title>
</head>

<frameset rows="25%,75%">
    <frame name="a" src="./top.html">
    <frameset cols="25%,75%">
        <frame name="b" src="./left.html">
        <frame name="c" id="c" src="./right1.html">
    </frameset>
</frameset>
</html>
